Gema Araujo caught this wonderful solar prominence on September 2, 2007 at 08:56 UT. More of Gema's images can be seen at www.astrosurf.com/obsolar/.

Canadian solar observers Ralph Chou and John Ginder recorded four hours of solar prominence activity on September 23, 2007. They captured about 30GB of data, stacked the 40 best frames and produced a wonderful 5 second movie clip that is posted on YouTube. http://www.youtube.com/watch?v=PNabV7qHtkE

The timestamp in their clip is EDT (Eastern Daylight Time) You'll notice details come and go which they didn't see live on their screen until they produced the movie.This is an amazing effort with a 3 inch telescope, a Coronado filter, 4X Barlow and Lumenera camera. Hopefully other observers will give it a try.

Remember to send me any solar drawings, SID flares or photos for me to include here.

Michael Hill, SID Analyst 114 Prospect St Marlborough, MA 01752 USA noatak@aol.com

The events listed above meet at least one of the following criteria

1. Event reported by two or more observers within +/- 5 minutes
2. Event matched to GOES-8 XRA event to within +/- 15 minutes and event time < 1000 UT
3. Reported by observer with a high quality rating > 8 (scale 1-10)

Solar Events

September was a very slow month for SID activity. In fact there was no activity. As you can see there is no bar graph to the upper right as there usually is because there were 0 correlated SID events submitted by our observers. Even the GOES-12 Data shows a dearth of X-Ray flares. There were only 16 this past month and all but three were B class events. The others still only C Class at that.

All reports submitted to me were that of NO SID's detected. All except mine. As is depicted in the graph on the previous page I did register something towards the end of the day. It sure looks like a SID event but there were no X-Ray flares recorded that day or other observations by observers to correlate with. This is one of those rare cases where an event that seems important goes unreported. It may seem like the wrong way to go but it is in fact consistent with the data set that goes back many years now. To report it would be to change the criteria that we use and therefore skew the data. It couldn't have been a SID. In fact I have two systems running and the other did not record it. This highlights the fact that not every event you see is in fact a SID. There are other factors at work and on occasion the effect of these factors will appear as a SID signature. This is why we correlate with other observers and why it is good to have many observers to cross correlate with. So keep on monitoring. Your sumbissions are always important even when the times are slow. And slow they are at these days.

Solar Flare Summary Based on GOES-12 Data

Sunspot Data

American Relative Sunspot Numbers(Ra) for September 2007 [boldface = maximum, minimum] Day N Raw Mean Ra 1 44 22 16 2 40 14 11 3 44 11 8 4 33 10 7 5 41 10 7 6 33 3 2 7 36 0 0 8 40 0 0 9 30 0 0 10 32 0 0 11 39 0 0 12 32 0 0 13 33 0 0 14 35 1 0 15 43 0 0 16 41 0 0 17 34 0 0 18 32 0 0 19 30 0 0 20 34 0 0 21 34 0 0 22 30 0 0 23 39 0 0 24 37 1 0 25 38 0 0 26 36 0 0 27 30 3 2 28 34 14 11 29 24 15 10 30 27 14 11 Means 35.2 3.9 2.8 Total No. of Observers: 58 Total No. of Observations: 1055

September 2007 Sunspot Observers AAP A. Abbott 19 AJV J. Alonso 17 ANGR R. Ang 30 BARH H. Barnes 11 BATR R. Battaiola 10 BEB R. Berg 10 BEDJ J. Bedient 15 BMF M. Boschat 21 BRAB B. Branchett 27 BRAD D. Branchett 17 BRAR R. Branch 28 BROB R. Brown 29 BVC A. Buck 30 CHAG G. Morales 27 CKB B. Cudnik 28 CLZ L. Corp 19 CNT D. Chantiles 7 COMT T. Compton 19 CVJ J. Carvajal 24 DEJV J. van Delft 18 DGP G. Dyck 13 DUBF F. Dubois 27 FERJ J. Fernandez 15 FLET T. Fleming 26 GFT F. Gobet 12 GOEM M. Goetz 1 HALB B. Halls 10 HAYK K. Hay 15 HMQ M. Harris 18 KAPJ J. Kaplan 25 KNJS J. & S. Knight 15 KROL L. Krozel 5 KUZM M. Kuzmin 4 LERM M. Lerman 12 MARJ J. Maranon 23 MCE E. Mochizuki 21 MCHL L. McHenry 3 MEU E. Mason 4 MILJ J. Miller 18 MMI M. Moeller 23 OATS S. Oatney 17 OBSO IPS Observatory 18 RICE E. C. Richardson 15 RITA A. Ritchie 18 SCGL G. Schott 29 SIMC C. Simpson 12 STEM G. Stemmler 17 STQ N. Stoikidis 24 SUZM M. Suzuki 24 SZUM M. Szulc 24 TESD D. Teske 24 TJV J. Temprano 23 URBP P. Urbanski 22 VARG A. Vargas 24 VIDD D. Vidican 18 WILW W. Wilson 21 WRP R. Wheeler 4 YESH H. Yesilyaprak 25

Reporting addresses: Sunspot Reports Email: solar@aavso.org Postal Mail: AAVSO, 49 Bay State Rd. Cambridge, MA, 02138 Fax: 617-354-0665 SID Flare Reports Email: noatak@aol.com Postal Mail: Mike Hill, 114 Prospect St., Marlboro, MA, 01752

Smoothed Mean Sunspot Numbers (Rsm) from January 2000 to March 2007 (Waldmeier method).

10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for September 2007 (10cm Source: http://www.drao.nrc.ca/icarus)